dts: st: Rename JTAG reset pin for STM32WBA5 boards

 Renamed 'debug_jtrst_pb4' to 'debug_njtrst_pb4'
 for STM32WBA5 boards.
 Ensured consistency with the existing pinctrl
 definitions for STM32WBA6 boards.

(cherry picked from commit f467d8e039216b4f5f9b55dd8a1ffa8582fc516d)

Original-Signed-off-by: F. Ramu <francois.ramu@st.com>
Original-Signed-off-by: IBEN EL HADJ MESSAOUD Marwa <marwa.ibenelhadjmessaoud-ext@st.com>
GitOrigin-RevId: f467d8e039216b4f5f9b55dd8a1ffa8582fc516d
Cr-Build-Id: 8717525757717771169
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8717525757717771169
Copybot-Job-Name: zephyr-hal_stm32-copybot-downstream
Change-Id: I6b53582b721e18eefc03ec1b11a66b1ac6f1a895
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/hal_stm32/+/6456199
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Commit-Queue: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>